Comments (2)
This happens because we're trying to vmap a range of pages, some of which don't have shadow/origin pages backing them.
Although this saves us some bits of memory (a pretty small amount though), it's hard to distinguish between pages that do and don't have metadata.
The problem can be fixed by reserving __GFP_NO_KMSAN_SHADOW
for internal pages and always allocating the metadata for tracked kernel pages.
If for some reason we want to ignore such a page, we can keep an additional bit for that.
from kmsan.
Seems to be fixed now.
from kmsan.
Related Issues (20)
- duplicate stack origin PC HOT 2
- The return value of 'sscanf()' should be checked HOT 1
- Don't zero out origin of uninitialized bytes in kmsan_internal_set_shadow_origin() HOT 1
- KMSAN must use contiguous shadow for physical pages HOT 1
- Should we override gfp_flags when allocating metadata pages? HOT 1
- recipe for target 'vmlinux' failed? HOT 2
- trim aux frames from stacks HOT 1
- duplicate frame for local var origin HOT 1
- BUG: KMSAN: uninit-value in kmsan_handle_dma HOT 8
- Potential deadlock in stack_depot_save() HOT 1
- Some crypto configs that use asm are not disabled HOT 1
- BUG: NULL pointer dereference in wp_page_copy (kmsan specific) HOT 3
- Compile kmsan with clang-9 with -O2 ERROR HOT 2
- compile KMSAN error HOT 5
- https://www.google.com/webhp?client=ms-android-americamovil-us-revc&source=android-home&gws_rd=ssl
- Security Policy violation Binary Artifacts HOT 15
- can't compile if select KMSAN in ubuntu 2204 HOT 3
- arch/x86/kernel/module.c:230:49: error: call to undeclared library function 'memcpy' HOT 13
- KMSAN doesn't support paravirtualization
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from kmsan.